This year, the Philadelphia Convention and Visitors Bureau (PHLCVB) has 19 “citywide” events on the books — gatherings that generate 2,000 or more hotel room stays on its peak night — matching the number of citywides held in 2019 before the pandemic. The marquee events include the NCAA Division I men’s basketball east regional in late March at the Wells Fargo Center, which is expected to fill more than 8,000 hotel rooms. The return of the Army-Navy football game this winter, projected to attract 50,000 visitors, will “really help our December and help us finish the year out strong,” said Ed Gr…